New stereocontrolled transformations in the imidazolosugar series
作者:Kamil Weinberg、Stefan Jankowski、Didier Le Nouen、Andrzej Frankowski
DOI:10.1016/s0040-4039(01)02320-6
日期:2002.2
The isomeric imidazolopyrrolidinose 1, imidazolopiperidinose 2 and imidazoloazepanose 3, potential glycosidase inhibitors, were obtained in several steps from d-glucose.
5]hexopiperidinoses 2–6 and imidazol-4(5)-yl C-glycosides 7–9 are reported. The crucial step of this approach relies upon the SN2-type cyclisation of selectively protected C(1), C(2), C(3) and C(5)-substituted 1-[imidazol-4(5)-yl]pentitols in which the imidazolenitrogen or the C(1)-connected oxygen are involved as the competitive nucleophilic centers, respectively. Six selected imidazolosugars were evaluated as potential